Usage:
Hartland Formation of Hutchinson River Group (CT*,NY*)
Hartland Group (CT)
Subunits:
GROUP STATUS (alphabetical) --all in CT: Ansonia Gneiss, Bee Brook Formation, Cooks Pond Schist, /Litchfield Schist, Mount Rat Schist, Mount Tom Amphibolite, Prospect Formation, Rattlesnake Hill Formation, Satans Kingdom Formation, The Straits Schist, Trap Falls Formation.
FORMATION STATUS: Carringtons Pond Member (CT,NY), Hitchcock Lake Member (CT), Pelham Bay Member (NY*), Southington Mountain Member (CT), The Straits Schist Member (CT).
Geologic age:
Cambrian to Ordovician*
Type section, locality, area and/or origin of name:
Town of Hartland in northwest Hartford Co., CT (Rice and Gregory, 1906).
AAPG geologic province:
New England province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).